I'm having an issue with Microsoft Exchange Control Panel.
I have 2 servers with Exchange installed, both have the Client Access role, however only one has the Mailbox and Hub Transport roles. When I log in to the server hosting the Exchange Mailbox and Hub Transport roles, I am able to access the ECP webapp no problem. However, on the Internet-facing server (with only Client Access) I get the following error:
Sorry! Access denied. You don't have permission to open this page. If you're a new user or were recently assigned credentials, please wait 15 minutes and try again. If the problem persists, contact your administrator.
Best Answer
... After the third attempt rebooting, everything started working perfectly. No idea what the problem was, but it's fixed now. Disaster averted.